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Better Method for Spotweld in LSDYNA ?

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Hello Guys,


I want to connect two rollers with 2D shell-Mesh  which are inclined at an arbitrary angle and i want to connect them with spotwelds.


Which method is better 1) Mesh Independant : Where we connect Element  to Element via Spots and Contacts with MAT 100 and Property.  or 2) Mesh Dependant where Node to Node Connections are specially established without any contacts and so on ?


So what  are specifically Pros and cons of these methods ? Can anybody help me out ?


Thanks !





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